Lemco HDMOD-Q1 Operation Manual

Lemco HDMOD-Q1 manual v1.0

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4x HDMI to 4x DVB-T (COFDM)

"Home" modulator

HDMOD-Q1

Operation Manual

Lemco HDMOD-Q1 manual v1.0

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1. IMPORTANT SAFETY PRECAUTIONS INFORMATION

READ THE FOLLOWING WARNINGS BEFORE YOU USE

YOUR DEVICE

WARNING

The following safety precautions must be observed to prevent fire or electric
shock hazard. Safety precautions include but are not restricted to the following:

Power supply / Mains cord

• Operate the unit only within the voltage range defined as appropriate by the

manufacturer.

• Occasionally check the power connector and remove dirt or dust that may

have accumulated.

• Use only the mains cord that comes with your unit.

• Do not operate the unit or plug in the mains cord if it is broken, split, or

damaged in any way.

• Do not place the mains cord next to heating devices. Do not pull it, place

heavy objects on it or damage it in any way. Keep it out of reach of children.

• Ensure that the device is plugged in a properly grounded socket. Insufficient

grounding may cause electrocution.

• Always carefully disconnect all plugs by pulling on the plug and not on the

cord. Make sure the unit's power switch is turned off before removing the
cord from an outlet.

• Disconnect the mains cord when the unit is not in use for long periods of time

or during storms.

• Do not connect the unit to a multiple-outlet to avoid plug overheating.

Disassembling

• This unit contains parts that cannot be repaired by the user. Do not

disassemble or try to repair it as this will void all warranties. Please contact
the manufacturer if you experience any problems with your unit.

Water/humidity

• Do not keep the unit in a humid place or near water.

• Do not plug/unplug the unit with wet hands.

Fire

• Never place a candle or another source of fire on the unit as it may fall and

start a fire.

• If the mains cord or the power connector is damaged or destroyed, or if there

is a sudden loss of picture during operation, or if you notice a strange smell or
there is smoke, immediately switch the unit off, disconnect the mains cord and
contact the manufacturer’s technical support department.

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Installation / Storage

• This unit contains high precision pieces of electronics. To ensure optimal

performance and avoid damage, do not store it in any location where it may
collect dirt, duct, lint, etc. Do not expose it to extreme heat or cold (e.g. in
direct sunlight, near a heater or in the car during the day). Place the unit in a
secure place to avoid falls.

• Before moving the unit, always unplug all cords first.

• When installing the unit, make sure that an outlet is within easy reach. In case

of malfunction, switch the unit off and unplug the power cord. When the unit
is not in use for a long period of time, make sure that the mains cord is
disconnected.

Connectivity

• Before connecting the unit to other electronic devices, always switch off and

unplug all devices.

Maintenance

• Do not spill liquids on the unit. Do not use any diluents or volatile liquid to

clean the unit. Instead, use a soft slightly damp cloth and allow the unit to dry
completely before using again.

Handling

• Do not poke your finger into the openings on your unit.

• Never put paper, metal parts or other objects into the openings of your unit. If

you suspect that there are foreign parts in your unit, switch it off and unplug
the mains cord. Contact the manufacturer’s technical support department.

• Do not step on or place heavy objects on top of the unit. To avoid hardware

damage, handle all buttons, connectors and switches gently.

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2. INTRO

Congratulations on purchasing the HDMOD-Q1. You now own a high quality,
“Home” DVB-T HD modulator. To get the most out of your purchase, please take the
time to carefully read through this manual

3. INSTRUCTIONS

3.1 DESCRIPTION

The HDMOD-Q1 is a high quality quad DVB-T "Home" modulator which accepts
four HDMI inputs and converts them into four RF DVB-T channels on its output. The
excellent picture (Full HD 1920*1080-30p) and modulation quality (MER~35dB)
renders the HDMOD-Q1 the ideal solution for distributing SD/HD digital signals
coming from e.g. a DVD player, STB or camera in a CATV network using the DVB­T technology.

The user has the ability to control the device by either using the onboard SSD (Seven
Segment Display) interface and keypad for quick installation or by using the USB
interface with the appropriate software accompanying the HDMOD-Q1 for advance
programming.
Finally, the HDMOD-Q1’s metal case provides excellent electromagnetic shielding as
well as great temperature dissipation and rigidness.

3.2 FEATURES

• 4 x DVB-T RF out

• High quality and performance

• Very clean RF spectrum

• MER value ~ 35dB

• RF output frequencies 174...862MHz

• H.264 HD encoder bitrate 1-19Mbps

• HDCP support

• User friendly interface for quick installation

• USB interface for advanced programming

• External power supply

3.2.1 Auto-reset functions and watchdog

During the normal operation of the HDMOD-Q1, the main CPU monitors all the
internal parts in order to ensure that the device works normally. In case of an internal
error or module failure, the HDMOD-Q1 immediately initiates the recovery procedure
by resetting the appropriate module or the device. Finally, watchdog timers ensure
that the device will be reset in case of CPU failure.

3.2.2 Buttons lock-mechanism

The HDMOD-Q1 will lock the functionality of its buttons after 5 min idle time to
avoid of being pushed accidentally. Two red dots on the SSD notify the user that the

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button interface is locked. To unlock it, the user must press simultaneously the UP +
DOWN buttons for 5sec approximately.

3.2.3 Digital attenuator

The HDMOD-Q1 has an embedded digital attenuator. The user is able to select
between three different attenuation steps as follows:

1. 0 dB attenuation (Output level: 90dbμV) SSD will display: “00”

2. 10 dB attenuation (Output level: 80dbμV) SSD will display: “10”

3. 25 dB attenuation (Output level: 65dbμV) SSD will display: “25”

3.2.4 HDCP ON/OFF function

By pressing the “Channel / Profile” button for more than 5sec the user enables the
HDCP ON/OFF function. The SSD will display this status as follows:

1. H1 : Indicating that the HDCP is ON

2. H0 : Indicating that the HDCP is OFF

Using the Up/Down buttons the user is able to select one of the above status to
enable/disable the HDCP function. The HDMOD-Q1 will exit from the current
functionality after being idle for more than 2-3sec.

3.2.5 USB interface for advance programming

The HDMOD-Q1 provides a USB interface with the appropriate software for
advanced programming. For more information please read Appendix A.

3.3 BLOCK DIAGRAM

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3.4 FRONT PANEL

Figure No.1

1. Channel / Profile selection button

2. Seven Segment Display (SSD)

3. Up / Down buttons

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4. LED indicators

a. Lock: ON when HDMI communication have been established
b. Channel: ON when “Channel” mode is selected
c. Attenuation: ON when “Attenuator” mode is selected
d. Channel: ON when “Profile” mode is selected

5. Modulator selection button

6. HDMI input for modulator Νο 1

7. HDMI input for modulator Νο 2

8. USB port for advanced programming

9. HDMI input for modulator Νο 3

10. HDMI input for modulator Νο 4

11. +12VDC / 2A PSU input

12. Choice indication LED for modulator Νο 3

13. Choice indication LED for modulator Νο 4

14. Choice indication LED for modulator Νο 1

15. Choice indication LED for modulator Νο 2

3.3 INSTALLATION

The HDMOD-Q1 can be programmed with one of the following ways:

• From the front panel display

• From the USB interface

3.3.1 Installation using the Front panel display

The user is able to install very quick and easy multiple HDMOD-Q1s using the SSD +
Button interface of the front panel of the device, following the steps below:

1st Step

Power up the HDMOD-Q1 by adding the external power supply. The HDMOD-Q1
will need 40-50secs to initialize itself. The SSD (Seven Segment Display – No 2 /
Figure No1 ) depicts the initialization status.

2nd Step

Choose a modulator by pressing the MOD Select button (No 5 / Figure No.1). The
LED display will turn on depending on the modulator that is selected.

3rd Step

Choose “Channel mode” by pressing the Channel/Profile button (No 1 / Figure No.1 )

The “Channel LED” will lit indicating that “Channel” selection mode is selected.

4th Step

Choose “Attenuation mode” by pressing the Channel/Profile button (No 1 / Figure
No.1 ) The “Attenuation LED” will lit indicating that “Attenuation” selection mode is
selected.